Run details:
Mozilla/5.0 (Macintosh; Intel Mac OS X 10_15_7) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/85.0.4183.121 Safari/537.36
Chrome 85
Mac OS X 10.15.7
Desktop
4 years ago
Test name Executions per second
undefined 5521906.0 Ops/sec
typeof 15742706.0 Ops/sec
in 15977000.0 Ops/sec
hasOwnProperty 13566665.0 Ops/sec
bool 15994156.0 Ops/sec
Script Preparation code:
Tests:
  • undefined

  • typeof

  • in

  • hasOwnProperty

  • bool